Handle-bar for bicycles.



PATENTED AUG. 28, 1906.

B. TULKA. HANDLE BAR FOR BIGYGLES. APPLICATION rum min: 21-,1905.

in in UK rn: NORRIS PETERS co., WASHINGTON, n. c"

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 28, 1906.

A li ti fil d June 21,1905. Serial No. 266.248.

To all whom it may concern:

Be it known that I, BOHUMIL TULKA, a subject of the Emperor of Austria-Hungary, residing at Prague, in the Kingdom of B0- hemia, Austria-Hungary, have invented certain new and useful Improvements in the Mechanism of Handle-Bars for Bicycles and the Like, of which the following is a specificatlon.

My invention relates to handle-bars for bicycles; and it consists in certain improvements in handle-bars of the detachable type whereby the mechanism is strengthened and the o eration of attaching or detaching the hand e-bars from the head or steeringspin dle is greatly facilitated.

Referring to the accompanying drawings, Figure 1 is a view of the mechanism, showing certain parts in section. Fig. 2 is a plan view. Fig. 3 is a view similar to Fig. 1, but of a modified form of the invention; and Fig. 4 is a lan view of what is shown in Fig. 3.

In a l the figures, 4 is the head of a bicycle or the like, and 5 a reduced extension or stud thereon, the latter having a non-circular cross-section.

2 in Figs. 1 and 2, and 3 in Figs. 3 and 4, represent a tubular part formed with a fork 1, in which the handle-bars are secured, as by being welded thereto.

Referring now to Figs. 1 and 2 6 is a tubular part sliding in the part 2, said parts 2 and 6 having transverse coinciding openings-re ceiving the stud 5 and of substantially the same form, so that the parts cannot rotate on the stud. The part 6 is formed with the reduced threaded extension 7, which projects through the bushing 8, secured in the part 2 by screws 9. On the threaded extension 7 is a nut 12, which may bear against the bushing 8 and which is kept from running off the end of the extension 7 by the latter having its free end upset, as at 11.

In Figs. 3 and 4 the part 3 is arranged telescopically within a'tubular part 13, said parts 3 and 13 having coinciding transverse openings receiving and formed to fit the stud 5. In the rear end of the part 3 is secured by a pin a threaded extension 14, on the threaded portion of which is a nut 12, which may bear against the end of the part 13. Upon manipulating the nut the parts 2 and 6 or 3 and 13 will be caused to move longitudinally, either acting to clamp themselves to the stud 5 or release the same, as will be obvious, according to the direction inwhich the nut is turned.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a bicycle handle-bar, the combination of the head, two cylindrical members arranged telescopically and having coinciding transverse openings receiving a portion of the head, one of said members having a reduced threaded extension, formed with a riveted head at its free end and a nut arranged on said threaded extension and adapted to abut against the other member, substantially as described. 7

In testimony whereof I aflix my signature in presence of two witnesses.

BOHUMIL TULKA. 

